Hi Sachin,

When exposing a REST API in Mendix, it’s essential to implement several layers of security to ensure that only authorized users can access the API and that the data remains protected. First, you should enable authentication—either through Mendix-native user authentication, OAuth 2.0, or API keys, depending on your requirements. Authentication ensures that only known users or systems can access the service. Next, implement authorization by mapping user roles to microflows and exposed resources, ensuring that users can only access the data and operations appropriate to their permissions. Use HTTPS (SSL/TLS) to encrypt data in transit and protect sensitive information from interception. You should also apply rate limiting or throttling to protect against abuse and potential denial-of-service attacks. Additionally, use input validation and sanitization to prevent injection attacks or malformed data from compromising your system. Logging and monitoring access to the API can help detect suspicious activity and audit usage. Finally, consider enabling CORS restrictions to control which domains can interact with your API, and always keep your Mendix environment and modules updated with the latest security patches. By combining these measures, you can ensure your REST API is robust, secure, and aligned with best practices.

Hope it helps!